>> pamela, we know that dzhokhar tsarnaev has been sedated, intubated. how would it be possible for investigators to communicate with him? >> it is certainly possible with what doctors call a sedation holiday. i spoke with our medical correspondent elizabeth cohen earlier this morning. and she tells us that if doctors or authorities really wanted to talk with him, they can decrease his sedation so that they would be able to communicate with them and that he could perhaps communicate with them in writing. because you have to remember, there is a tube down his throat. he's still on a breathing machine. but with the sedation holiday, apparently patients are still pretty out of it but they are able to understand what's being said to them. this could last anywhere from a few minutes to a few hours. john? >> all right. pamela brown with us here in boston this morning. i want to bring in former cia analyst peter brookes. he's a former analyst for the cia, as i said, also with the defense department. thank you so much for being with us this morning. i really app